So for an actual, in-game question: makeinu: It is MYLO, and both scum are still alive. There are 2 votes on a lurker, and the other 3 haven't voted yet, including the lurker. How do you proceed?
Hmm... I'm presuming from the wording that I'm one of the three not yet voting, and not one of the scum or the lurker. So, I'm going to think this one aloud, rather than just give an answer.
Highly situational dependent. Ordinarily, lynching a lurker is good policy, early in the game. They're not helping root out scum, and presumably good information is gained from their role-flip. MyLo changes that, however. Learning that your lurker was Town playing badly doesn't help when it hands the scum the win. So there's no blanket right answer to that.
It comes down to my own suspicions, evidence from vote records on days past, et cetera. How long has this lurker been lurking? Did they show evidence of good scum-hunting then go quiet? Were they questionable before, and started lurking under pressure? What about the two voters, what's their track record so far? Same for the other active non-voter?
You can only pressure a lurker so much, to be honest, before it becomes counter-productive. So, presuming that the lurker wasn't fairly obvious scum from previous behavior, I'd turn my attentions elsewhere and continue to withhold my vote. At five players, MyLo, you're in serious danger of the scum quickhammering the lynch.
For the record, I watched that exact situation develop in a game I ran once. The scum had successfully set up another player in a solid frame-job and eliminated them, then at MyLo placed one vote on a Townie that had suspicion built up against them from previous days, and waited. Once a second vote came, down came the hammer and the win.
Two votes on a target at MyLo means only one of two things: either the lurker
is scum, or both the votes are scum already. If the evidence doesn't point to the former, assume the latter, and start pressuring one or both. One of them will break, because that's just a dumb situation to put yourself in.